Quantum Gates MCQs with Answers

Welcome to the Quantum Gates MCQs with Answers. In this post, we have shared Quantum Gates Online Test for different competitive exams. Find practice Quantum Gates Practice Questions with answers in Physics Tests exams here. Each question offers a chance to enhance your knowledge regarding Quantum Gates.

Quantum Gates Online Quiz

By presenting 3 options to choose from, Quantum Gates Quiz which cover a wide range of topics and levels of difficulty, making them adaptable to various learning objectives and preferences. You will have to read all the given answers of Quantum Gates Questions and Answers and click over the correct answer.

• Test Name: Quantum Gates MCQ Quiz Practice
• Type: Quiz Test
• Total Questions: 40
• Total Marks: 40
• Time: 40 minutes

Note: Answer of the questions will change randomly each time you start the test. Practice each quiz test at least 3 times if you want to secure High Marks. Once you are finished, click the View Results button. If any answer looks wrong to you in Quizzes. simply click on question and comment below that question. so that we can update the answer in the quiz section.

0

---

Quantum Gates

Please fill out the form before starting Quiz.

1 / 40

Which gate is used in Grover's algorithm to invert about the mean?

Hadamard

Oracle

Diffusion

2 / 40

What is the matrix representation of the Hadamard gate?

[1 0; 0 -1]

1/√2 [1 1; 1 -1]

[0 1; 1 0]

3 / 40

Which gate is also known as the controlled-controlled-NOT gate?

SWAP gate

Toffoli gate

Fredkin gate

4 / 40

What is the action of the Pauli-Y gate on a qubit?

Rotation by π around X

Rotation by π around Z

Rotation by π around Y

5 / 40

Which gate has a matrix representation of [1 0; 0 -1]?

Pauli-Y gate

Pauli-Z gate

Pauli-X gate

6 / 40

Which gate is also known as the controlled-Z gate?

CRZ gate

CNOT gate

CZ gate

7 / 40

Which gate can be used to entangle two qubits?

Pauli-X gate

CNOT gate

SWAP gate

8 / 40

Which gate is used to implement the Toffoli gate in combination with other gates?

Pauli-X gate

Hadamard gate

CNOT gate

9 / 40

What is the purpose of the Toffoli gate?

Controlled-Z gate

Controlled-controlled-NOT

Controlled-Y gate

10 / 40

Which gate is known as a universal gate in quantum computing?

Pauli-X gate

CNOT gate

Hadamard gate

11 / 40

Which gate is required for universal quantum computation along with the Hadamard gate?

CNOT gate

Pauli-Z gate

Pauli-Y gate

12 / 40

Which gate is used for error correction in quantum computing?

SWAP gate

Fredkin gate

Toffoli gate

13 / 40

What is the quantum equivalent of a classical NOT gate?

Pauli-X gate

Pauli-Z gate

Pauli-Y gate

14 / 40

What is the effect of the Hadamard gate on the

0⟩ -

(

1⟩ state?

15 / 40

Which gate applies a π/2 phase shift to the

S gate

T gate

1⟩ state?

16 / 40

Which gate performs a controlled phase shift by π?

CRZ gate

CNOT gate

CZ gate

17 / 40

Which gate is used to create superposition?

Hadamard gate

Toffoli gate

T gate

18 / 40

What is the result of applying a Hadamard gate to the

0⟩

+⟩ state?

19 / 40

What is the unitary matrix for the Pauli-X gate?

[0 -i; i 0]

[1 0; 0 -1]

[0 1; 1 0]

20 / 40

What is the primary function of the Fredkin gate?

Controlled-NOT

Controlled-Z

Controlled-SWAP

21 / 40

Which gate changes the phase of a qubit by 180 degrees?

Pauli-X gate

Pauli-Y gate

Pauli-Z gate

22 / 40

Which gate is essential for creating quantum entanglement?

Pauli-X gate

CNOT gate

Hadamard gate

23 / 40

Which gate is used in quantum teleportation protocols?

CNOT gate

SWAP gate

Fredkin gate

24 / 40

Which gate is used to implement the Deutsch algorithm?

Hadamard gate

Pauli-X gate

Toffoli gate

25 / 40

What is the action of the Pauli-Z gate on the

Changes the phase by π

1⟩ state?

Flips the state to

26 / 40

Which gate is represented by the matrix [1 0; 0 e^(iπ/4)]?

T gate

S gate

Hadamard gate

27 / 40

Which gate flips the state of a qubit from

0⟩ to

Pauli-X gate

1⟩?

28 / 40

Which gate converts the basis state

0⟩ +

0⟩ to the superposition (

1⟩)/√2?

29 / 40

Which gate has the effect of negating the amplitude of the

1⟩ state?

Pauli-X gate

Pauli-Z gate

30 / 40

Which gate is represented by the matrix [1 0; 0 i]?

S gate

Pauli-Y gate

T gate

31 / 40

Which gate swaps the states of two qubits?

Toffoli gate

Fredkin gate

SWAP gate

32 / 40

Which gate performs a conditional NOT operation?

Toffoli gate

CNOT gate

Fredkin gate

33 / 40

Which gate is used for controlled phase rotation?

CNOT gate

CZ gate

CRZ gate

34 / 40

What is the outcome of applying the Pauli-X gate twice to a qubit?

Orthogonal state

Original state

Superposition state

35 / 40

What is the effect of a CNOT gate on the state

11⟩?

10⟩

36 / 40

What is the two-qubit gate commonly used in quantum circuits?

Hadamard gate

Pauli-X gate

CNOT gate

37 / 40

Which gate can be used to implement the quantum Fourier transform?

CNOT gate

Pauli-X gate

Hadamard gate

38 / 40

Which gate is also known as the π/8 gate?

T gate

Hadamard gate

S gate

39 / 40

What is the matrix representation of the T gate?

[1 0; 0 e^(iπ/4)]

[1 0; 0 -1]

[1 0; 0 i]

40 / 40

Which gate creates a Bell state when applied with a CNOT gate?

Hadamard gate

T gate

S gate

0%

Restart quiz

Download Certificate of Quiz Quantum Gates

On the end of Quiz, you can download the certificate of the quiz if you got more than 70% marks. Add a certificate to your job application or social profile (like LinkedIn) and get more job offers.

Download Quantum Gates MCQs with Answers Free PDF

You can also download 100 Quantum Gates Questions with Answers free PDF from the link provided below. To Download file in PDF click on the arrow sign at the top right corner.

If you are interested to enhance your knowledge regarding  English, Chemistry, Computer, and Biology please click on the link of each category, you will be redirected to dedicated website for each category.