Question
A train 210 m long passes a platform 390 m long in 30
seconds. Find the time it will take to pass a pole.Solution
Total distance to pass platform = 210 + 390 = 600 m Speed = distance / time = 600 / 30 = 20 m/s In km/h: 20 × (18/5) = 72 km/h Time to pass a pole = length of train / speed = 210 / 20 = 10.5 seconds
Which of the following is used to speed up data retrieval in a relational database?
What does the term "referential integrity" mean in a database context?
In the context of databases, what does the term sharding refer to?
Which database model is based on the mathematical set theory and is the foundation of many modern databases?
Pick the odd one out.
What is the full form of DBMS?
How many types of architecture we have in DBMS
Which of the following joins returns all rows from both tables, filling in NULL values for non-matching rows?
Which of the following is true about Information?
Which of the following storage devices is considered non-volatile?
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