Question
Find the area of a figure consisting of a rectangle with
length 8 cm and width 5 cm, and a semicircle with a diameter equal to the width of the rectangle. (Use π = 3.14)Solution
Area of rectangle = 8 × 5 = 40 cm² Area of semicircle = (1/2)πr² = (1/2) × 3.14 × (5/2)² = 9.8 cm² Total area = 40 + 9.8 = 49.8 cm².
In a relational database, what is a candidate key?
In two-phase locking, a transaction releases its locks:
Which of the following is a non-relational database?
Which of the following is a type of phishing attack?
Which interrupt is generated by software?
Which of the following illustrates an advantage of DBMS over traditional file systems?
Which deadlock prevention scheme allows older transactions to preempt younger ones?
Which database model represents data in a tree-like structure, where each child record has only one parent?
Which SQL command is used to retrieve data from a table?
Which constraint ensures that a column contains only unique values, but allows NULL values?
