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PC Basics Questions - All Grades

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Grade 10 PC Basics
Which of the following is the correct logical expression for the sum of a 2-bit binary adder?
  1. Sum S = (A AND B) OR ((NOT A) AND (NOT B))
  2. Sum S = ((NOT A) AND B) OR (A AND (NOT B))
  3. Sum S = ((NOT A) OR B) AND (A OR (NOT B))
Grade 10 PC Basics
What is the Boolean expression of the circuit shown?
  1. X = (A˅B) ^ (C^D)
  2. X = (A˅B) ^ (C˅D)
  3. X = (A^B) ˅ (C^D)
  4. X = (A^B) ˅ (C˅D)
Grade 10 PC Basics
When is the output (X) of gate 3 FALSE?
  1. A=1, B=0, C=1 and D=1
  2. A=1, B=1, C=0 and D=1
  3. A=1, B=1, C=0 and D=0
  4. A=1, B=0, C=0 and D=0
Grade 10 PC Basics
What is the difference between binary system and denary system?
  1. The denary system has a base value of 10, whereas the binary system has a base value of 2.
  2. The denary system has 10 different digits for representation, whereas the binary system has 2 different digits for representation.
  3. Binary system is understandable to computers, whereas the denary system is understandable to humans.
  4. All of the above.
Grade 10 PC Basics
In which phase(s) of software development is(are) programming, testing and documentation done?
  1. Implementation
  2. Evaluation
  3. Maintenance
  4. Implementation and Maintenance
Grade 10 PC Basics
Which of the following is NOT a function of Editor used in IDEs?
  1. Checks errors
  2. Indentation
  3. Provides different colors for variables
  4. Improves readability of the code
Grade 10 PC Basics
Which of the following is FALSE about compilers?
  1. It translates a program written in a high-level language into machine code
  2. A compiled code can be used multiple times without recompilation.
  3. In case an error is found in a line, the compiler prompts the user to correct the error.
  4. It optimizes the code.
Grade 12 PC Basics
Where do you change the font size?
  1. Home tab
  2. Review tab
  3. View tab
  4. Edit tab
Grade 10 PC Basics
To which register(s) is instruction copied in the fetch process?
  1. MDR only
  2. To MDR first and then, to CIR
  3. To MDR first and then, to PC
  4. MAR only
Grade 10 PC Basics
Which of the following operations are NOT performed by the Arithmetic and logic unit?
  1. Addition, subtraction and multiplication
  2. READ and WRITE operation
  3. AND, OR and NOT
Grade 10 PC Basics
Grade 10 PC Basics
Which of the following is TRUE about the WRITE operation?
  1. Contents of memory are copied to MDR
  2. Contents of MDR are copied to memory
  3. Contents of memory are copied to MAR
  4. Contents of MAR are copied to memory
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