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Consider four processes P, Q, R, and S scheduled on a CPU as per round-robin algorithm with a time quantum of 4 units. The processes arrive in the order P, Q, R, S, all at time t = 0. There is exactly one context switch from S to Q, exactly one context switch from R to Q, and exactly two context switches from Q to R. There is no context switch from S to P. Switching to a ready process after the termination of another process is also considered a context switch. Which one of the following is NOT possible as CPU burst time (in time units) of these processes?  
Let L1, L2 be any two context-free languages and R be any regular language. Then which of the following is/are CORRECT? I. L1 ∪ L2 is context-free II. L̅1 is context-free III. L1 – R is context-free IV. L1 ∩ L2 is context-free
Which of the following are determinants in transactional communication? A. Social context B. Cultural context C. Relational context D. Legal context E. Delayed context Choose the correct answer from the options given below:
Read the given statements carefully. Assuming that the information given in the statements is true, decide which of the given conclusions is based on the Statements. Statements: 1. Ram goes to mathematics class on Monday. 2. He attends literature classes on Friday. 3. He goes to guitar classes the day before he goes to history classes. 4. He attends history classes 2 days before literature classes.
Consider the following statements: 1. The classes of type 15-19, 20-24, 25-29 etc. are exclusive classes. 2. The classes of type 15-20, 20-25, 25-30 etc. are inclusive classes. Which of the above statements is/are correct?
Consider the following statements in connection with deflection-type and null-type instruments: 1. Null-type instruments are more accurate than the deflection-type ones. 2. Null-type of instrument can be highly sensitive compared to a deflection-type instrument. 3. Under dynamic conditions, null-type instruments are less preferred to deflection-type instruments. 4. Response is faster in null-type instruments as compared to deflection-type instruments. Which of the above statements are correct?
Select differences between reference type and value type: i. Memory allocated to ‘Value type’ is from heap and reference type is from ‘System. ValueType’ ii. Memory allocated to ‘Value type’ is from ‘System. ValueType’ and reference type is from ‘Heap’ iii. Structures, enumerated types derived from ‘System. ValueType’ are created on stack, hence known as ValueType and all ‘classes’ are reference type because values are stored on heap
Consider the following languages L1 = {ap | p is a prime number} L2 = {anbmc2m | n ≥ 0, m ≥ 0} L3 = {anbnc2n | n ≥ 0} L4 = {anbn | n ≥ 1} Which of the following are CORRECT? I. L1 is context-free but not regular. II. L2 is not context-free III. L3 is not context-free but recursive. IV. L4 is deterministic context-free
Consider the following grammar and the semantic actions to support the inherited type declaration attributes. Let X1, X2, X3, X4, X5 and X6 be the placeholders for the non-terminals D, T, L or L1 in the following table: Production rule Semantic action D → T L X1.type = X2.type T → int T.type = int T → float T.type = float L → L1, id X3.type = X4.type addType(id.entry, X5.type) L → id addType(id.entry, X6.type)   Which one of the following are the appropriate choices for X1, X2, X3 and X4?
A school has 10 classes with the same number of students in each class. One day, the weather was bad and many students were absent. 3 classes were half full. 5 classes were 3/4 full and 2 classes were 1/6 empty. A total of 74 students were absent. What is the total number of students in this school?