18 Ownership & Borrowing questions from the Rust bank, written for Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd.
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A.the discipline whereby each value has exactly one variable responsible for it, and the value is dropped when that variable goes out of scope
B.an immutable borrow written with a single ampersand that grants read-only access and may coexist with any number of others to the same value
C.a borrow written with ampersand-mut that grants read-write access and, while it exists, must be the exclusive way the value is accessed
D.the compile-time component that enforces the aliasing rule of one writer XOR many readers and rejects programs that would otherwise have data races or use-after-free
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2. Which term means: "the discipline whereby each value has exactly one variable responsible for it, and the value is dropped when that variable goes out of scope"?
Junior
A.Borrow checker
B.Shared reference
C.Move
D.Ownership
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3. Which statement is correct?
Junior
A.Ownership — the transfer of responsibility for a value to a new binding, after which the original binding is invalidated and can no longer be used
B.Ownership — the behavior of types like integers and bool whose values are duplicated bit-for-bit on assignment, leaving the original binding still usable
C.Ownership — the discipline whereby each value has exactly one variable responsible for it, and the value is dropped when that variable goes out of scope
D.Ownership — a borrow written with ampersand-mut that grants read-write access and, while it exists, must be the exclusive way the value is accessed
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4. What is Move?
Junior
A.the compile-time component that enforces the aliasing rule of one writer XOR many readers and rejects programs that would otherwise have data races or use-after-free
B.the transfer of responsibility for a value to a new binding, after which the original binding is invalidated and can no longer be used
C.the discipline whereby each value has exactly one variable responsible for it, and the value is dropped when that variable goes out of scope
D.a borrow written with ampersand-mut that grants read-write access and, while it exists, must be the exclusive way the value is accessed
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5. Which term means: "the transfer of responsibility for a value to a new binding, after which the original binding is invalidated and can no longer be used"?
Junior
A.Borrow checker
B.Copy semantics
C.Shared reference
D.Move
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6. Which statement is correct?
Junior
A.Move — the behavior of types like integers and bool whose values are duplicated bit-for-bit on assignment, leaving the original binding still usable
B.Move — the discipline whereby each value has exactly one variable responsible for it, and the value is dropped when that variable goes out of scope
C.Move — the compile-time component that enforces the aliasing rule of one writer XOR many readers and rejects programs that would otherwise have data races or use-after-free
D.Move — the transfer of responsibility for a value to a new binding, after which the original binding is invalidated and can no longer be used
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7. What is Shared reference?
Junior
A.an immutable borrow written with a single ampersand that grants read-only access and may coexist with any number of others to the same value
B.the behavior of types like integers and bool whose values are duplicated bit-for-bit on assignment, leaving the original binding still usable
C.the discipline whereby each value has exactly one variable responsible for it, and the value is dropped when that variable goes out of scope
D.the compile-time component that enforces the aliasing rule of one writer XOR many readers and rejects programs that would otherwise have data races or use-after-free
Answer + AI explanation with Pro
8. Which term means: "an immutable borrow written with a single ampersand that grants read-only access and may coexist with any number of others to the same value"?
Junior
A.Ownership
B.Borrow checker
C.Shared reference
D.Move
Answer + AI explanation with Pro
9. Which statement is correct?
Junior
A.Shared reference — the discipline whereby each value has exactly one variable responsible for it, and the value is dropped when that variable goes out of scope
B.Shared reference — the compile-time component that enforces the aliasing rule of one writer XOR many readers and rejects programs that would otherwise have data races or use-after-free
C.Shared reference — a borrow written with ampersand-mut that grants read-write access and, while it exists, must be the exclusive way the value is accessed
D.Shared reference — an immutable borrow written with a single ampersand that grants read-only access and may coexist with any number of others to the same value
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10. What is Mutable reference?
Mid
A.the discipline whereby each value has exactly one variable responsible for it, and the value is dropped when that variable goes out of scope
B.the compile-time component that enforces the aliasing rule of one writer XOR many readers and rejects programs that would otherwise have data races or use-after-free
C.the transfer of responsibility for a value to a new binding, after which the original binding is invalidated and can no longer be used
D.a borrow written with ampersand-mut that grants read-write access and, while it exists, must be the exclusive way the value is accessed
Answer + AI explanation with Pro
11. Which term means: "a borrow written with ampersand-mut that grants read-write access and, while it exists, must be the exclusive way the value is accessed"?
Mid
A.Mutable reference
B.Ownership
C.Borrow checker
D.Shared reference
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12. Which statement is correct?
Mid
A.Mutable reference — a borrow written with ampersand-mut that grants read-write access and, while it exists, must be the exclusive way the value is accessed
B.Mutable reference — the transfer of responsibility for a value to a new binding, after which the original binding is invalidated and can no longer be used
C.Mutable reference — the behavior of types like integers and bool whose values are duplicated bit-for-bit on assignment, leaving the original binding still usable
D.Mutable reference — an immutable borrow written with a single ampersand that grants read-only access and may coexist with any number of others to the same value
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13. What is Borrow checker?
Mid
A.the transfer of responsibility for a value to a new binding, after which the original binding is invalidated and can no longer be used
B.the discipline whereby each value has exactly one variable responsible for it, and the value is dropped when that variable goes out of scope
C.the compile-time component that enforces the aliasing rule of one writer XOR many readers and rejects programs that would otherwise have data races or use-after-free
D.a borrow written with ampersand-mut that grants read-write access and, while it exists, must be the exclusive way the value is accessed
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14. Which term means: "the compile-time component that enforces the aliasing rule of one writer XOR many readers and rejects programs that would otherwise have data races or use-after-free"?
Mid
A.Ownership
B.Shared reference
C.Move
D.Borrow checker
Answer + AI explanation with Pro
15. Which statement is correct?
Mid
A.Borrow checker — the compile-time component that enforces the aliasing rule of one writer XOR many readers and rejects programs that would otherwise have data races or use-after-free
B.Borrow checker — an immutable borrow written with a single ampersand that grants read-only access and may coexist with any number of others to the same value
C.Borrow checker — the discipline whereby each value has exactly one variable responsible for it, and the value is dropped when that variable goes out of scope
D.Borrow checker — the transfer of responsibility for a value to a new binding, after which the original binding is invalidated and can no longer be used
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16. What is Copy semantics?
Mid
A.an immutable borrow written with a single ampersand that grants read-only access and may coexist with any number of others to the same value
B.the behavior of types like integers and bool whose values are duplicated bit-for-bit on assignment, leaving the original binding still usable
C.the discipline whereby each value has exactly one variable responsible for it, and the value is dropped when that variable goes out of scope
D.the compile-time component that enforces the aliasing rule of one writer XOR many readers and rejects programs that would otherwise have data races or use-after-free
Answer + AI explanation with Pro
17. Which term means: "the behavior of types like integers and bool whose values are duplicated bit-for-bit on assignment, leaving the original binding still usable"?
Mid
A.Copy semantics
B.Borrow checker
C.Move
D.Shared reference
Answer + AI explanation with Pro
18. Which statement is correct?
Mid
A.Copy semantics — a borrow written with ampersand-mut that grants read-write access and, while it exists, must be the exclusive way the value is accessed
B.Copy semantics — the behavior of types like integers and bool whose values are duplicated bit-for-bit on assignment, leaving the original binding still usable
C.Copy semantics — the transfer of responsibility for a value to a new binding, after which the original binding is invalidated and can no longer be used
D.Copy semantics — the compile-time component that enforces the aliasing rule of one writer XOR many readers and rejects programs that would otherwise have data races or use-after-free
Answer + AI explanation with Pro
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