Class 9 Computer Science · Chapter 2 · Test 1
Excercise Questions
9 MCQs and 10 Short Questions
19 questions · 20 min · 39 marks
Want to try first? Take the free Computer Science test: Extra Mcqs Test
Sample questions
The first 5 of 19. Try each one, then tap to see the answer.
Question 1
Which of the following Boolean expressions represents the OR operation?
- AA+B
- BA.B
- CA̅
- DA⊕B
Show answerHide answer
Answer: A
The OR operation is represented by the Boolean expression A+B.
Question 2
What is the dual of the Boolean expression?
- AA+B
- BA.B
- CA-B
- DA/B
Show answerHide answer
Answer: A
The dual of a Boolean expression is obtained by interchanging OR with AND and 0 with 1.
Question 3
Which logic gate outputs true only if both inputs are true?
- AOR gate
- BAND gate
- CXOR gate
- DNOT gate
Show answerHide answer
Answer: B
The AND gate produces a true output only when both inputs are true.
Question 4
What is the decimal equivalent of the binary number 1101₂?
- A11
- B12
- C13
- D14
Show answerHide answer
Answer: C
1101₂ = 1×8 + 1×4 + 0×2 + 1×1 = 13₁₀.
Question 5
What is the first step in the systematic process of troubleshooting?
- AEstablish a Theory of Probable Cause
- BImplement the Solution
- CIdentify Problem
- DDocument Findings Actions and Outcomes
Show answerHide answer
Answer: C
The first step in troubleshooting is to identify the problem in the system.
More tests in System Design and Troubleshooting
Practise with a free account
Save your scores, see which chapters need work, and keep a notebook of every question you got wrong.