Process control block in operating system is defined as:
Show Hint
- Each process is represented in the operating system by a process control block (PCB)—also called a task control block.
- Process control block is used to store only process state.
- Process control block is used to control a block.
- Process control block tells us about logic behind process.
The Correct Option is A
Solution and Explanation
The **Process Control Block (PCB)** is a data structure used by the operating system to store information about a process. It holds various details such as process state, program counter, CPU registers, memory management information, and I/O status. It is a critical part of process management.
Step 1: Evaluate the options. - **Option 1** is the correct definition, as the PCB represents a process in the operating system. - **Option 2** is incorrect because the PCB stores more than just the process state; it stores other information like registers and I/O status. - **Option 3** is incorrect; the PCB doesn't control a block. - **Option 4** is incorrect because the PCB does not tell the logic behind the process. Thus, the correct answer is option **1**.
Top CUET PG Data Science Questions
- Consider the following relation \( R = \{(4,5), (5,4), (7,6), (6,7)\} \) on set \( I = \{4,5,6,7\} \). Which of the following properties relation \( R \) does not have? (A) Reflexive property
(B) Symmetric property
(C) Transitive property
(D) Antisymmetric property
Choose the correct answer from the options given below: - What will be the output after minimizing the following expression with the help of a K-map? \[ F(X,Y) = X Y + X Y' + X Y \]
Find the least upper bound and greatest lower bound of \( S = \{X, Y, Z\} \) if they exist, of the poset whose Hasse diagram is shown below:
- For a Non-deterministic Finite Automaton (NDFA) with \( N \) number of states, the equivalent Deterministic Finite Automaton (DFA) has \( D \) number of states. Then, possible number of states in DFA can be defined as:
Suppose \( D_1 = (S_1, \Sigma, q_1, F_1, \delta_1) \) and \( D_2 = (S_2, \Sigma, q_2, F_2, \delta_2) \) are finite automata accepting languages \( L_1 \) and \( L_2 \), respectively. Then, which of the following languages will also be accepted by the finite automata:
(A) \( L_1 \cup L_2 \)
(B) \( L_1 \cap L_2 \)
(C) \( L_1 - L_2 \)
(D) \( L_2 - L_1 \)
Choose the correct answer from the options given below:
Top CUET PG Process Creation and Management Questions
- The operating system is not responsible for:
- In the context of process creation, arrange the following statements in sequential order of their occurrence: A. One of the two processes typically uses the exec() system call to replace the process's memory space with a new program.
B. A new process is created by the fork() system call.
C. The parent can then create more children; or, can issue a wait() system call to move itself off the ready queue.
D. The exec() system call loads a binary file into memory (destroying the memory image of the program containing the exec() system call) and starts its execution.
Choose the correct answer from the options given below:
Top CUET PG Questions
- Given below are two statements:
Statement I: For Plato the meaning of the word 'Justice' is basically a conception in the mind only.
Statement II: For Plato the meaning of the word 'Justice' is fixed, mind-independently
In the light of the above statements, choose the correct answer from the options given below: - What is the electron count of OS6CO182-?
- XeF4 hydrolysis gives A + B, HF, and Oxygen. Find A and B
- What is more basic in pyrol and pyridine?
- Hydrolysis of Al2C3, Be2?